There aren’t many tech fields that move faster than the cell phone world. Not only are the devices themselves designed to be disposable within two years, but the back-end technology powering the networks is constantly being upgraded.

That means the transition to the next generation of wireless communications is already under way. The latest is called 4G — and all of the carriers are peppering their marketing with the phrase. What many are failing to do, though, is explain what’s so important about 4G and why consumers should care.

Read more at CNBC.com